Excavating implement



Dec. 14, 1943. T. A. RA'rKowsKl 2,335,749

' EXGAVATING IMPLEME'NT Filed Dec. 3, 1942 Patented Dec. 14, 1943 EXCAVATN G IMPLEMEN T Thomas A. Ratkowski signor to American 19 Claims.

The present invention relates to excavating apparatus and more particularly to the body construction for a clipper or the like.

Among the objects of the present invention is to provide a body construction for an excavating implement which, while having the capacity to function efficiently in a conventional manner, will be of comparatively light weight, simple and cheap in construction, and free from internal resistance to loading and discharge, and having a comparatively smooth exterior that minimizes obstruction to penetration of the material excavated.

More particularly the objects set forth above are assured by providing a body of multi-part construction for an implement of the type herein dis closed including a front, a back and side members, and in which the parts are provided with interiltting shouldered rabbeted margins serving as mediums of transmission of digging thrust and involving novel features of welding construction in the manner of their connection that renders the Welds particularly durable in service, while all the structural features combine to produce a onepiece body particularly adapted for assuring the results herein contemplated.

The present invention further includes as an object the provision of a body structure for an excavating implement in which the parts are designed with thickened margins affording rabbetted connections having interengaging shoul-v ders positioned to transmit thrust in the planes of the parts, and in which certain of the opposed shoulders are provided in spaced apart relation to form channels or grooves .that give form to the weld llets and insure ample dimensions of said llets, and so present them between pairs of shoulders that the saine are under compression in the transfer of thrust as distinguished from being in shear as in the case cf a llet deposit upon a plane surface to provide a shoulder in the path of a metal edge.

Another object within the purview of the pres- -ent invention is to provide a novel body structure for excavating implements in which the channels or grooves formed between the opposed shoulders of the rabbeted margins of the parts forming the side walls of the implements have portions offset with respect to one another -to more efficiently and eilectively resist the Working stresses to which the implements are subjected during use.

As a further object, the present invention contemplates the provision of channels or grooves as Chicago Heights, Ill., as-

n Brake Shoe Company, a corporation of Delaware Application December 3, 1942, Serial No. 467,766

herein identified on both the inner and outer faces of said side walls.

The present invention further contemplates novel body structure for excavating implements in which the grooves formed between the shoulders of the rabbeted margins of the parts of the side walls on the outer and inner faces thereof are provided with intermediate and end offset portions, respectively, for increasing the effective resistance to working stresses to which the implements are subjected during use.

Other objects, features, capabilities and advantages are comprehended by the invention, as will later appear and as are inherently possessed thereby.

Referring to the drawing- Figure 1 is a fragmentary view in side elevation of an excavating implement made in accordance with the present invention and having parts thereof broken away to show certain structure thereof more in detail; and

Figure 2 is a fragmentary view in cross-section taken in the plane represented by line 2 2 of Figure 1 of the drawing.

Referring now more in detail to the drawing, an excavating implement incorporating the novel features of construction according to the present invention is shown in the for-m of a clipper of multi-part construction, including the front 2 and back Il, each of which is substantially U- shaped in formation to provide the side extensions such as 6 and 8, respectively. The clipper in its assembled form is provided with a plurality of teeth (not disclosed) which are socketed or mounted in the bases lil formed as a part of the front member 2 adjacent its forward cutting edge. The back is provided with a number of lugs such at l2, li and I6, to which a bail, dipper stick and linkage may be connected in a conventional manner, whereby the dipper is operated for excavating or moving various types of material. Furthermore, the front and back 2 and 4 are formed to provide an opening atA the rear of .the clipper which is closed by a door (not disclosed) hinged, for example, to the lugs or ears such as I8, and which may be latched in closed position to the forward member 2 in any desired manner.

The invention has as its principal object the provision of a connection between the front and back to provide a rigid assembly which is simple and cheap in construction and free from internal resistance to loading and discharge, and has a comparatively smooth exterior that minimizes obstruction to penetration of the material excavated. To this end, the side extensions of front and back are formed with rabbeted margins having shoulders and 22, respectively, which are adapted to form together with the opposed edge of the contiguous side extensions, grooves such as 24 and 26, the former being on the outer face of the dipper and the latter being on the inner face of the dipper. These grooves or channels are filled with a deposit of weld material which is provided for interlocking and securing the interftting rabbeted margins of these extensions together.

It will be noted that the parts of the excavating implement are secured together by weld deposits which are put under compression between the opposed shoulders of the seams to resist working stresses as distinguished from lap weld seams involving iillets of metal put under shear by the digging stresses, and thus more effectively providing for the resistance of working stresses to which such dippers are subjected. To more eifectively increase the resistance to such working stresses in the present dipper construction the groove or channel 24, while generally extending from the rear of the side walls toward the forward cutting edge of the dipper, nevertheless is provided with an intermediate offset portion 28 which is disposed to more eifectively resist the working and digging stresses applied to the dipper at or adjacent the forward part thereof. This increase of effective resistance to these working stresses is further supplemented by the provision of an offset portion 30 provided at the forward end of the groove 2S, which offset groove portion in cooperative relation with the offset portion 28 of the groove 24 effectively facilitates the transmittal of working stresses between the parts 2 and 4.

If desired, the shouldered weld seams hereinabove described for connecting parts 2 and 4 of the dipper together may further include a plurality of plugs or lugs 32 which are distributed in any desired manner and which lugs are received in aligned openings provided in the rabbetted margins of the side extensions 6 and 8.

yThe said lugs, together with the walls of the openings in the side extensions 6 and 8, provide channels or grooves formed with opposed shoulders adapted to receive weld deposits such as 34 and 3B, which further effectively connects the parts of the dipper construction together. As

-in the case of the weld deposits within the grooves 24 and 26, these weld deposits are under compression during operation of the dipper, thus securing maximum advantage in the use of such weld deposits.

While the said plugs or lugs 32 are shown as separate elements in the embodiment selected to disclose the invention, it is to be understood that the same may be formed integrally with either of the side extensions o or 8 and welded in socketed relation to the other in the manner disclosed, which construction would secure the results which are herein described.

It is quite apparent from the above description that the weld deposits provided inthe vgrooves or channels 24 and 25, as well -as those rweld deposits 34 and 3S used in connecting the plugs or lugs in position, are under compression at all times for the transmission of stresses from one member of the assembly to another, thus providing a strong and durable structure which is able to withstand hard usage over extended periods of time. The arrangement is such that the interior of the dipper is substantially free from internal resistance to loading and discharge and that the exterior of the dipper is comparatively smooth, thus minimizing the obstruction to the penetration of the dipper to the material being excavated, all of which factors are important in a construction of this type.

While I have herein described and upon the drawing shown an illustrative embodiment of the invention, it is to be understood that the invention is not limited thereto but may comprehend other constructions, arrangements of parts, details and features without departing from the spirit of the invention.v

What is claimed is:

1. An excavating implement comprising a body of multi-part construction which in its assembled relation provides a front, a back and side walls and in which the side walls are provided with intertting shouldered rabbeted margins, said rabbeted margins providing opposed shoulders defining grooves between the parts forming said side walls and being disposed between the front and back and extending from the rear of said side walls in the direction of the forward cutting edge of said body, and weld deposits within said grooves for securing said parts in assembled relation.

2. An excavating implement as defined in claim 1, in which the grooves between the opposed shoulders are formed on the inner and outer faces of said side walls and in which welding material is deposited for securing the contiguous parts together.

3. An excavating implement -as defined in claim 1, in which additional securing means in the form of lugs are provided for said parts, characterized by being in socketed relation with at least one of said parts to form channels therewith adapted to receive weld deposits for further interlocking said parts together.

4. An excavating implement as defined in claim 1, in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with the contiguous parts forming said side walls and providing channels therewith on the inner and outer faces thereof adapted to receive weld deposits for further interlocking said parts together.

5. An excavating implement as defined in claim 1, in which the grooves between the opposed shoulders are formed on the inner and outer faces of said side walls and in which welding material is deposited for securing the contiguous parts together, land in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with at least one of said parts to form channels therewith adapted to receive weld deposits for further interlocking said parts together.

6. An excavating implement as deiined in claim 1, in which the grooves between the opposed shoulders are formed on the inner and outer faces of said side walls and in which welding material is deposited for securing the contiguous parts together, and in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with the contiguous parts forming said side walls and providing channels therewith on the inner and outer faces thereof adapted to receive weld deposits for further interlocking said parts together.

7. An excavating implement comprising a body of multi-part construction which in its assembled relation provides a front, a back and side walls and in which the side walls are provided with intertting shouldered rabbeted marsaid rabbeted margins providing opposed shoulders deiining grooves between the parts io ning said side walls and being disposed bete. en the front and back and extending from e rear of said side walls in the direction of the forward cutting edge of said body, said grooves having portions oifset with respect to one another for increasing the effective resistance to r-.f'orking stresses, and weld deposits within said grooves for securing said parts in assembled relation.

8. An excavating implement as defined in claim 7, in which the grooves between the opposed shoulders are formed on the inner and cuter faces of said side walls and in which welding material is deposited for securing the contiguous parts together.

9. An excavating implement as dened in claim 7, in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with at least one of said parts to form channels therewith adapted to receive weld deposits for further interlocking said parts together.

10. An excavating implement as defined in claim 7, in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with the contiguous parts forming said side walls and providing channels therewith on the inner and outer faces thereof adapted to receive weld deposits for further interlocking said parts together.

11. An excavating implement as defined in claim 7, in which the grooves between the opposed shoulders are formed on the inner and outer faces of said side walls and in which welding material is deposited for securing the contiguous parts together, and in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with at least one of said parts to form channels therewith adapted to receive weld deposits for further interlocking said parts together.

12. An excavating implement as dened in claim 7, in which the grooves between the opposed shoulders are formed on the inner and outer faces of said side walls and in which welding material is deposited for securing the contiguous parts together, and in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with the contiguous parts forming said side Walls and providing channels therewith on the inner and outer faces thereof adapted to receive weld deposits for further interlocking said parts together.

13. An excavating implement comprising a body of multi-part construction which in its assembled relation provides a front, a back and side walls and in which the side walls are provided with intertting shouldered rabbeted margins, said rabbeted margins providing opposed shoulders dening grooves between the parts forming saidside walls and being disposed between the front and back and extending from the rear of said side walls in the direction of the forward cutting edge of said body, certain of the grooves formed between said parts having intermediate oifset t ns and certain other of said grooves formed een said parts having end odset portions, both being disposed to increase the effective resistance to working stresses, and weld deposits within said grooves for securing said parts in assembled relation.

14. An excavating implement as denned in claim 13, in which the grooves having the intermediate oifset portions are disposed on the outer faces of said side walls and the grooves having the end offset portions are disposed on the inner faces of said side Walls, and in which Welding material is deposited for securing the contiguous parts together.

15. An excavating implement as clened in claim 13, in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with at least one of said parts to form channels therewith adapted to receive weld deposits for further interlocking said parts together.

16. An excavating implement as defined in claim 13, in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with the contiguous parts forming said side walls and providing channels therewith on the inner and outer faces thereof adapted to receive weld deposits for further interlocking said parts together.

17. An excavating implement as defined in claim 13, in which the grooves having the intermediate oiiset portions are disposed on the outer faces of said side walls and the grooves having the end offset portions are disposed on the inner faces of said side walls and in which Welding material is deposited for securing the contiguous parts together, and in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with at least one of said parts to form channels therewith adapted to receive weld deposits for further interlocking said parts together.

18. An excavating implement as dened in claim 13, in which the grooves having the intermediate ofset portions are disposed on the outer faces of said side walls and the grooves having the end oifset portions are disposed on the inner faces of said side Walls and in which welding material is deposited for securing the contiguous parts together, and in which additional securing means in the form of lugs are provided for said parts characterized by being in socketed relation with the contiguous parts forming said side walls and providing channels therewith on the inner and outer faces thereof adapted to receive weld deposits for further interlocking said parts together.

19. An excavating implement comprising a body of multi-part construction including front and back members having confronting side extensions provided with rabbeted margins adapted to intert with each other, said intertting rabbeted margins having opposed shoulders defining grooves between said extensions, and weld deposits within said grooves for securing said members in assembled relation.

THOMAS A. RATKOWSKI. 

